--- a/build-aux/texinfo.tex	Sun Oct 25 01:10:47 2015 -0700
+++ b/build-aux/texinfo.tex	Mon Oct 26 07:02:41 2015 -0700
@@ -3,7 +3,7 @@
 % Load plain if necessary, i.e., if running under initex.
 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
 %
-\def\texinfoversion{2015-10-21.19}
+\def\texinfoversion{2015-10-26.14}
 %
 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -5244,10 +5244,9 @@
     \global\setbox\boxA=\hbox\bgroup\unhbox\boxA
     % #1 is the page number.
     %
-    % The following is kludged to not output a line of dots in the index if
-    % there are no page numbers.  The next person who breaks this will be
-    % cursed by a Unix daemon.
-    \setbox\boxB = \hbox{#1}%
+    % Get the width of the page numbers, and only use
+    % leaders if they are present.
+    \global\setbox\boxB = \hbox{#1}%
     \ifdim\wd\boxB = 0pt
       \null\nobreak\hfill\ %
     \else
@@ -5262,6 +5261,9 @@
       \fi
     \fi
     \egroup % end \boxA
+    \ifdim\wd\boxB = 0pt
+    \global\setbox\entryindexbox=\box\boxA
+    \else
     \global\setbox\entryindexbox=\vtop\bgroup\noindent
     % We want the text of the entries to be aligned to the left, and the
     % page numbers to be aligned to the right.
@@ -5290,11 +5292,8 @@
       \ifnum\dimen@>\dimen@ii
         % If the entry is too long, use the whole line
         \dimen@ = \dimen@ii
-      \else
-        % Cause stretch of 1fill at the end of the first line, to avoid
-        % extra spacing in a short first line.
-        \hskip 0pt plus 1fill
       \fi
+      \advance\leftskip by 0pt plus 1fill % ragged right
       \parshape = 2 0pt \dimen@ 1em \dimen@ii
       % Ideally we'd add a finite glue at the end of the first line only, but
       % TeX doesn't seem to provide a way to do such a thing.
@@ -5308,10 +5307,11 @@
     \spaceskip=\fontdimen2\font minus \fontdimen4\font
     %
     \linepenalty=1000  % Discourage line breaks.
-    \hyphenpenalty=10000  % Discourage hyphenation.
+    \hyphenpenalty=5000  % Discourage hyphenation.
     %
     \par % format the paragraph
     \egroup % The \vtop
+    \fi
   \endgroup
   % delay text of entry until after penalty
   \bgroup\aftergroup\insertindexentrybox